Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Chemistry in Everyday Life
Calcium sulphate hemihydrate is another name of :
1
Washing Soda
2
Baking Soda
3
Plaster of Paris
4
More than one of the above
5
None of the above